I tried to make a SMP xenU from the current xenU 2.0-testing.hg tree
and failed. Is SMP for xenU's still possible in 2.0?
I re-enabled the SMP config question in the Kconfig file and then
the build fails immediately in asm-offset.s. Building a non-SMP kernel
works just fine.
Here are the compile msgs and the Kconfig diff:
CC arch/i386/kernel/asm-offsets.s
In file included from include/asm-xen/asm/msr.h:4,
from include/asm-xen/asm/processor.h:17,
from include/asm/thread_info.h:17,
from include/linux/thread_info.h:21,
from include/linux/spinlock.h:12,
from include/linux/capability.h:45,
from include/linux/sched.h:7,
from arch/i386/kernel/asm-offsets.c:7:
include/linux/smp.h: In function `on_each_cpu':
include/linux/smp.h:67: warning: implicit declaration of function
`current_thread_info'
include/linux/smp.h:67: error: invalid type argument of `->'
include/linux/smp.h:70: error: invalid type argument of `->'
include/linux/smp.h:70: warning: implicit declaration of function
`test_thread_flag'
include/linux/smp.h:70: error: `TIF_NEED_RESCHED' undeclared (first use
in this function)
include/linux/smp.h:70: error: (Each undeclared identifier is reported
only once
include/linux/smp.h:70: error: for each function it appears in.)
In file included from include/asm-xen/asm/processor.h:17,
from include/asm/thread_info.h:17,
from include/linux/thread_info.h:21,
from include/linux/spinlock.h:12,
from include/linux/capability.h:45,
from include/linux/sched.h:7,
from arch/i386/kernel/asm-offsets.c:7:
include/asm-xen/asm/msr.h: In function `wrmsrl':
include/asm-xen/asm/msr.h:47: error: invalid type argument of `->'
In file included from include/asm/thread_info.h:17,
from include/linux/thread_info.h:21,
from include/linux/spinlock.h:12,
from include/linux/capability.h:45,
from include/linux/sched.h:7,
from arch/i386/kernel/asm-offsets.c:7:
include/asm-xen/asm/processor.h: In function `load_esp0':
include/asm-xen/asm/processor.h:500: error: invalid type argument of
`->'
In file included from include/linux/thread_info.h:21,
from include/linux/spinlock.h:12,
from include/linux/capability.h:45,
from include/linux/sched.h:7,
from arch/i386/kernel/asm-offsets.c:7:
include/asm/thread_info.h: At top level:
include/asm/thread_info.h:89: warning: `current_thread_info' was
declared implicitly `extern' and later `static'
include/asm-xen/asm/processor.h:500: warning: previous declaration of
`current_thread_info'
include/asm/thread_info.h:89: warning: type mismatch with previous
implicit declaration
include/asm-xen/asm/processor.h:500: warning: previous implicit
declaration of `current_thread_info'
include/asm/thread_info.h:89: warning: `current_thread_info' was
previously implicitly declared to return `int'
In file included from include/linux/spinlock.h:12,
from include/linux/capability.h:45,
from include/linux/sched.h:7,
from arch/i386/kernel/asm-offsets.c:7:
include/linux/thread_info.h:51: warning: `test_thread_flag' was declared
implicitly `extern' and later `static'
include/linux/smp.h:70: warning: previous declaration of
`test_thread_flag'
make[1]: *** [arch/i386/kernel/asm-offsets.s] Error 1
make: *** [arch/i386/kernel/asm-offsets.s] Error 2
$ hg diff linux-2.6-xen-sparse/arch/xen/i386/Kconfig
diff -r 9d3927f57bb2 linux-2.6-xen-sparse/arch/xen/i386/Kconfig
--- a/linux-2.6-xen-sparse/arch/xen/i386/Kconfig Sun Aug 28
02:43:33 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/Kconfig Mon Sep 26
14:39:48 2005
@@ -341,7 +341,7 @@
def_bool HPET_TIMER && RTC=y
config SMP
- bool
+ bool "Symmetric multi-processing support"
default n
#config SMP
# bool "Symmetric multi-processing support"
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